Precambrian history

About a billion years ago (Late Proterozoic), the supercontinent, Rodinia formed. South China was part of the supercontinent. South China was bordered by Mirovia Ocean to the north, Siberia to the east, Australia to the west, and Laurentia to the south as shown here in the Rodinia paleogeography. 750 million years ago, Rodinia rifted and South China became an isolated continent.

A hundred million years later, these fragmented pieces of continent assembled back together to create the supercontinent of Pannotia. South China collided with North China and Eastern Gondwana (mainly Australia).